PROCESS FOR MAKING SELF-EXTINGUISHING SYNTHETIC RESIN LAMINATES, AND LAMINATES MADE THEREBY

    公开(公告)号:GB2000472B

    公开(公告)日:1982-01-20

    申请号:GB7828156

    申请日:1978-06-28

    Applicant: HOECHST AG

    Abstract: Self-extinguishing laminates are made by an improved process, wherein individual layers of a carrier material are impregnated with a thermosetting phenolic resin containing a flame-retardant agent and the impregnated layers are placed one above another and bonded together by compressing them at elevated temperature and under elevated pressure to give a hardened laminate. More specifically, finely pulverulent phosphorus pentanitride as a flame-retarding agent is dispersed in the plasticized or non-plasticized thermosetting phenolic resin, with or without a diluent; the phenolic resin, based on its solid matter content, and the phosphorus pentanitride being used in an approximate ratio by weight of 100:4 to 100:15; and the phenolic resin, based on its solid matter content, and the carrier being used in an approximate ratio by weight of 100:80 to 100:150.

    INTUMESCENT FLAME-RETARDANT COATING COMPOSITIONS

    公开(公告)号:CA1098250A

    公开(公告)日:1981-03-24

    申请号:CA296255

    申请日:1978-02-03

    Applicant: HOECHST AG

    Abstract: INTUMESCENT FLAME-RETARDANT COATING COMPOSITIONS Intumescent flame-retardant coating composition consisting substantially of a film-forming agent, an ammonium polyphosphate, one or more substances which are carbonizable under the action of heat, a dispersant, and optionally a filler. The coating composition additionally contains an ammonium polyphosphate activator weighing 0.5 to 50 % of the weight of ammonium polyphosphate. The activator is constituted by at least one salt which contains water of crystallization which is liberated upon the composition being heated to about 35.degree.C.

    4.
    发明专利
    未知

    公开(公告)号:CH599277A5

    公开(公告)日:1978-05-31

    申请号:CH739974

    申请日:1974-05-30

    Abstract: 1437301 Flame-proof polyolefin compositions HOECHST AG and RUHRCHEMIE AG 20 June 1974 [4 Aug 1973] 27404/74 Addition to 1389994 Heading C3P The flame proof moulding compositions of Specification 1,389,994 comprising a polyolefin and up to 30 weight per cent of flame retardants comprising red phosphorus and at least one organic nitrogen compound which carbonizes after inflammation in a weight ratio of 99 : 1 to 1 : 99, are modified in that they contain as stabilizer (a) 1 to 10% by weight of the flame retardants of amidosulphonic acid or ammonium bisulphate, or (b) 5 to 15% by weight of the red phosphorus of a paraffin oil of density 0À83 to 0À88 g./cc. and a viscosity of 15 to 380 cp. at 18‹ C., a mineral oil boiling in the range 170‹ to 350‹ C. or a silicone oil, or (c) 20 to 50% by weight of the nitrogen compound of pentaerythritol. Examples describe compositions of polyethylene, red phosphorus, melamine or polyacrylonitrile and ammonium bisulphate, amidosulphonic acid, pentaerythritol, paraffin oil, mineral oil, silicone-polyether block copolymer oil and mixtures of paraffin oil with ammonium bisulphate or amidosulphonic acid.

    PROCESS FOR IMPARTING ANTISTATIC PROPERTIES TO RUBBER

    公开(公告)号:CA1079517A

    公开(公告)日:1980-06-17

    申请号:CA274637

    申请日:1977-03-23

    Applicant: HOECHST AG

    Abstract: Antistatic properties are imparted to rubber by admixing it with conductive carbon black, vulcanizing the resulting blend and forming the rubber. More specifically, the rubber is admixed with about 5 to 40 weight % of conductive carbon black which has an ASnumber of 15 to 35, a specific electric resistance of 10-1 up to 10-3 ohms x cm under a moulding pressure of 100 to 180 atmospheres absolute, a bulk density of 100 to 180 g/liter, a BET-surface area of 100 to 1000 m2/g. the carbon black is made by a process wherein an aqueous suspension of carbon black with an AS-number higher than 15 and prepared by subjecting hydrocarbons, which are liquid at room temperature, to thermal conversion at 1200 to 2000.degree.C. under pressures within the range 1 and 80 atmospheres absolute, and in the presence of oxygen or an oxygen-containing gas, and water scrubbing the resulting carbon-black-containing reaction gas, is intimately blended at 5 to 120.degree.C. under pressures of 1 to 20 atmospheres absolute, in liquid phase at a pH-value of 7 to 10, and for 1 to 20 minutes, with vaporizable liquid aliphatic or cycloaliphatic hydrocarbons, the carbon black is separated from liquid matter, then heated and thereby freed from hydrocarbons and water, and finally annealed for 20 to 30 minutes at 200.degree.C up to 2200.degree.C.

Patent Agency Ranking